Erasing device



R. JENNY ERASING DEVICE Filed Nov. l5, 1946 March 13, 1951 Patented Mar. 13, 1951 J- -UNITED STAT .ERASING nnvion Ren Jenny, New York, N. il gassignor, by mesne assignments, to Blue Bobin Corporation, New York, N. a domestic eprporation seas mart ni hugs .to easel iii- 7 strumentsfor typewritersofthe vtype" as isf set forth. in, mywco-pending application Serial ,No. 613,884 filed August 31, 1955, nowabandoned, and itsobject istolproyidean angular; or gooseneck extension 'for such instruments whereby the eraser thereof may be more conveniently presented for use wherein the platen roller having the matters-thereupon toheerased is seated writer with thelatterj bjeing'j'idiagrammatically wn-q v Fig zoislan enlarged "detail longitudinal secanal iewpf the instrument r I FizljfQ is an" enlarged transverse section taken on the line 3-3 of Fig. 2 in the direction of the arrow points.

Fig. 4 is a detail bottom plan view of one end of the instrument, and

Fig. is a detail perspective view of the eraser retaining member when the parts thereof are separate.

In several of the standard makes of typewriters the f-orked type-bar guides are above the frame thereof or at least accessible wherein a rotary erasing instrument having a straight handle may have supporting engagement therewith, but in other standard makes of typewriters the type-bar guides thereof are so seated within the framework as would necessitate an angular or offset extension for the erasing instrument in order that the latter may have supporting engagement therewith and the eraser presented in proper relation with the matter upon the paper to be erased, as the latter passes over the platen roller of the typewriter. In Figl of the drawings I have schematically illustrated a standard make of typewriter in which the forked type-bar guide A thereof is positioned within andbelow the upper face of the framework; and how my improved erasing instrument can have supporting engagement with the type-bar guide A thereof for retaining and directing the eraser directly upon the matter to be erased as the latter passes over the platen roller C. Yet the handle of the instrument will extend at an angle above the framework B whereupon the operator'may Application November 15, 1-46; Serial. No. 710,085

- In Switzerland November 15, 1946 through the reciprocation thereof transmit a rotar motion to the eraser." f Thisferasing instrument comprises a handle I slidably mo-unte d upon a tubular guide member which is 'journalled Ia spindle 3 and the latteris fso connected to the handle that through reciprocation of thehandle a rotary motion will b' g iian mmgd tothespindle 3." The angular or gopse neclgjextension consists of a cylindrical tube 4 having a'threaded'socket 5 'fonnedarone end thereof for detachable engagementfwitl'ia th eaded os at. h .low e d of t e? ui member 2. An annular shoulder 6""is shown adjacent the lower end of the spindle; 3 andis unted] for rotation in a" cavity provided between; the guide member 2. and "an: apertured an e rqi ci 'n with n t a i fi-I l free end of thefspindle is provided with a socket 8 'j'extendin g through the 'aperture'd' flange If and connected to this socket is one" end of "'a flexible cableor'shaftli. The opposite 'endof this tube {is providedwith another inwardly projecting ape'rtured flange Ill, throughwhich extends'the shaft 9, as well as with a threaded socket for detachably receiving a threaded boss shown at the inner end ofa nipple l I.

The outer cylindrical surface of the nipple II is tapered towards its outer end and a cylindrical bore I2 is formed therein for rotatably receiving an eraser retaining member. As best shown in Fig. 5 of the drawing, this eraser retaining member comprises a part l3 to which is detachably connected by means of the set screw 14 one end of the shaft 9 and a slidable part l5 provided with a socket 16 for receiving the cylindrical eraser l1. Part 15 is provided with a pair of oppositely disposed parallel arms l8 slidable within grooves IQ of the other part whereby, as the shaft 9 is rotated, the eraser l I will be caused to rotate therewith. Housed within the parts l3, l5 of the eraser retaining member is a coil spring 20 which normally forces the part l5 against the annular flange 2| extending inwardly from the outer end of the nipple. This spring 29 applies the required pressure upon the eraser I! as is necessary for erasing operations.

The lower outer surface of the nipple II has a longitudinally extending groove 22 formed therein and the inner end of this groove registers with a corresponding groove 23 formed in the extension tube 4 when the latter is connected to the nipple. Slidably retained in these grooves 22 and 23 is a split block 24 provided with a tapered set screw 25 capable of forcing the split arms of the block in frictional contact with the be erased on a sheet of paper, as the latter'pa sses over the platen roller of the-typewriter. By adlusting the lug 26 longitudinally of the nipple H the outer end of the latter may be retained in the proper spaced relation withthe sheet of paper having the matter thereon to be erased so that the coil spring 20 will exert the required pressure upon the eraser l1 according to the length of the latter when performing erasing operations. After theeraser ll is positioned upon the matter to be erased, the operator will reciprocate the handle I for rotating the eraser. By this arrangement the nipple II will retain the eraser directly upon a single letter of the matter to be erased without erasing adjacent letters and the type-bar guide A will provide a support for the instrument, yet the handle I will extend above the frame of the typewriter whereat the operator will have free access thereto when giving a reciprocity movernent thereto.

I claim: v v

1.. A rotary eraser instrument comprising, in eombi-nation, a handle, a rotatable shaft mounted ,within said handle, a nipple, means including a goose-neck tube connecting said nipple to said handle, a two-part holding member mounted for rotation within said nipple, a flexible shaft extending through said goose-neck tube for connecting said shaft with said holding member, a

socket carried by one part of said holding member and slidably connected to the other part of the same, and a lug externally carried by said nipple.

" tachably connecting said lug to said nipple.

3. An erasing instrument, for use in connection with a typewriter having a type-bar guide,

comprising a tubular guide member, a handle reciprocably disposed thereupon, an ofiset extension secured to said guide member, a flexible shaft extending through said extension, means interconnecting said shaft and said guide member, said means being responsive to reciprocation of saidhandle to impart a rotary movement to said shaft, a nipple connected to said extension, an eraser holding member within said nipple, means interconnecting said member and said shaft, and a lug on the external surface of said nipple engageablewith the type-bar guide.

RENE JENNY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

